Initial code commit for Toolkit 1.1.

[silc.git] / lib / silcutil / silclist.h

diff --git a/lib/silcutil/silclist.h b/lib/silcutil/silclist.h
index 2bf94112cf9bbb420177dc15ae19da22c43a1634..50213491f0b361239d015a5cd08606752499b777 100644 (file)
--- a/lib/silcutil/silclist.h
+++ b/lib/silcutil/silclist.h
@@ -1,10 +1,10 @@
 /*
 
-  silclist.h 
+  silclist.h
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 2002 - 2003 Pekka Riikonen
+  Copyright (C) 2002 - 2005 Pekka Riikonen
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@
 /****s* silcutil/SilcList/SilcList
  *
  * NAME
- * 
+ *
  *    typedef struct { ... } SilcList;
  *
  * DESCRIPTION
@@ -55,7 +55,7 @@ typedef struct {
 /****d* silcutil/SilcList/SILC_LIST_END
  *
  * NAME
- * 
+ *
  *    #define SILC_LIST_END ...
  *
  * DESCRIPTION
@@ -205,7 +205,7 @@ do {                                                                \
  *
  * DESCRIPTION
  *
- *    Adds new entry indicated by `entry' to the end of the list indicated 
+ *    Adds new entry indicated by `entry' to the end of the list indicated
  *    by `list'.
  *
  ***/
@@ -222,6 +222,48 @@ do {                                                       \
   (list).count++;                                      \
 } while(0)
 
+/****f* silcutil/SilcList/silc_list_insert
+ *
+ * SYNOPSIS
+ *
+ *    #define silc_list_insert(list, current, entry) ...
+ *
+ * DESCRIPTION
+ *
+ *    Insert new entry indicated by `entry' after the entry `current'
+ *    to the list indicated by `list'.  If `current' is NULL, then the
+ *    `entry' is added at the head of the list.  Use the silc_list_add
+ *    to add at the end of the list.
+ *
+ ***/
+#define silc_list_insert(list, current, entry)                          \
+do {                                                                    \
+  if (!(current)) {                                                     \
+    if ((list).head)                                                    \
+      *__silc_list_next(list, entry) = (list).head;                     \
+    else                                                                \
+      *__silc_list_next(list, entry) = NULL;                            \
+    if ((list).prev_set && (list).head)                                         \
+      *__silc_list_prev(list, (list).head) = entry;                     \
+    if (!(list).tail)                                                   \
+      (list).tail = (entry);                                            \
+    (list).head = (entry);                                              \
+    if ((list).prev_set)                                                \
+      *__silc_list_prev(list, entry) = NULL;                            \
+  } else {                                                              \
+    *__silc_list_next(list, entry) = *__silc_list_next(list, current);  \
+    *__silc_list_next(list, current) = entry;                           \
+    if ((list).prev_set) {                                              \
+      *__silc_list_prev(list, entry) = current;                                 \
+      if (*__silc_list_next(list, entry))                               \
+        *__silc_list_prev(list, *__silc_list_next(list, entry)) = entry; \
+    }                                                                   \
+    if ((list).tail == (current))                                       \
+      (list).tail = (entry);                                            \
+  }                                                                     \
+  (list).count++;                                                       \
+} while(0)
+
 /****f* silcutil/SilcList/silc_list_del
  *
  * SYNOPSIS
@@ -271,7 +313,7 @@ do {                                                                        \
  *
  * EXAMPLE
  *
- *    // Traverse the list from the beginning to the end 
+ *    // Traverse the list from the beginning to the end
  *    silc_list_start(list);
  *    while ((entry = silc_list_get(list)) != SILC_LIST_END) {
  *      ...